667350625 has 10 divisors (see below), whose sum is σ = 833922122. Its totient is φ = 533880000.

The previous prime is 667350617. The next prime is 667350641. The reversal of 667350625 is 526053766.

It can be written as a sum of positive squares in 5 ways, for example, as 365842129 + 301508496 = 19127^2 + 17364^2 .

It is not a de Polignac number, because 667350625 - 2³ = 667350617 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 533256 + ... + 534505.

Almost surely, 2^667350625 is an apocalyptic number.

It is an amenable number.

667350625 is a deficient number, since it is larger than the sum of its proper divisors (166571497).

667350625 is an equidigital number, since it uses as much as digits as its factorization.

667350625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067781 (or 1067766 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 40.

The square root of 667350625 is about 25833.1303755468. The cubic root of 667350625 is about 873.8791089488.

The spelling of 667350625 in words is "six hundred sixty-seven million, three hundred fifty thousand, six hundred twenty-five".